Terms like "Integration", "seamlessly", "enable", "send", "directly", "precise".
But need to be careful here. Let me proceed step by step.
"Integration" synonyms: integration, connection, linkage.
"numerous" → numerous
Wait, the user's instruction says "switch each term with 3 synonyms", so maybe even technical terms unless they are proper nouns. But "CAD" is an acronym, so if it's part of a proper noun like AutoCAD, it stays, but "CAD programs" is a generic term. So replace "CAD programs" with synonyms like "design software", "3D modeling programs", "engineering tools".
"send" synonyms: send, transmit, forward.
"validate" synonyms: validate, confirm, verify.